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arXiv 1509.04423physics.flu-dyncond-mat.dis-nncond-mat.softnlin.PSphysics.geo-ph
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Wedding通过非局部、协同孔隙填充稳定流体侵入多孔介质

Wettability stabilizes fluid invasion into porous media via nonlocal, cooperative pore filling

Ran Holtzman, Enrico Segre

摘要:

研究了润湿性对无序多孔介质中粘性流体非混溶驱替的影响。我们提出了一种新的孔隙尺度模型,捕捉润湿性和动态效应,包括时空非局部性与接口rereadjustment。我们的模拟结果表明,增加浸润流体的润湿性(接触角)促进合作孔隙填充,稳定的入侵,并且这种效果被抑制的流速增加,由于粘性不稳定性。我们使用尺度分析来推导出两个预测位移模式的无量纲数。通过阐明潜在的机制,我们解释了经典而有趣的实验观察。这些见解可用于改进水力压裂、CO $_{2}$地质封存和微流体等技术。

英文摘要:

We study the impact of the wetting properties on the immiscible displacement of a viscous fluid in disordered porous media. We present a novel pore-scale model that captures wettability and dynamic effects, including the spatiotemporal nonlocality associated with interface readjustments. Our simulations show that increasing the wettability of the invading fluid (the contact angle) promotes cooperative pore filling that stabilizes the invasion, and that this effect is suppressed as the flow rate increases, due to viscous instabilities. We use scaling analysis to derive two dimensionless numbers that predict the mode of displacement. By elucidating the underlying mechanisms, we explain classical yet intriguing experimental observations. These insights could be used to improve technologies such as hydraulic fracturing, CO$_{2}$ geo-sequestration, and microfluidics.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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